﻿using Device.API.Dtos;
using Microsoft.AspNetCore.Mvc;
using Microsoft.AspNetCore.Mvc.Filters;
using System.Net;
using System.Net.Sockets;

namespace Device.API.Extensions
{
    public class ExceptionFilter:IExceptionFilter
    {
        private readonly ILogger<ExceptionFilter> _logger;
        private static readonly string Hostname;
        private static readonly string IpAddress;
        static ExceptionFilter()
        {
            //获取并缓存主机名和IP地址
            Hostname = Dns.GetHostName();
            var hostentry = Dns.GetHostEntry(Hostname);
            var ipaddress = hostentry.AddressList.FirstOrDefault(x => x.AddressFamily == AddressFamily.InterNetwork);
            IpAddress = ipaddress?.ToString() ?? "未知的IP";
        }
        public ExceptionFilter(ILogger<ExceptionFilter> logger)
        {
            _logger = logger;
        }
        public void OnException(ExceptionContext context)
        {
            //获取异常信息
            var exception = context.Exception;
            var exceptionMessage = exception.Message;
            var stackTrace = exception.StackTrace;
            //获取请求信息
            var requestPhth = context.HttpContext.Request.Path;
            var requestMethod = context.HttpContext.Request.Method;
            //记录错误日志，包括IP地址、请求路径、请求方法、异常消息和堆栈跟踪
            _logger.LogError("异常发生:\n" +
                $"主机名：{Hostname}\n" +
                $"IP地址：{IpAddress}\n" +
                $"请求路径：{requestPhth}\n" +
                $"请求方法：{requestMethod}\n" +
                $"异常消息：{exceptionMessage}\n" +
                $"堆栈跟踪：{stackTrace?.Substring(0, 50)}");
            //返回错误信息
            var errorResponsr = new ApiResult<string>
            {
                Code = -1,
                Message = "服务器内部错误，请稍后再试",
            };
            context.Result = new JsonResult(errorResponsr);
            //标记异常已处理，防止进一步传播
            context.ExceptionHandled = true;
        }
    }
}
